Mount St. Helens, Washington State

4.8
Mount St. Helens or Louwala-Clough (known as Lawetlat'la to the indigenous Cowlitz people, and Loowit to the Klickitat) is an active stratovolcano located in Skamania County, Washington, in the Pacific Northwest region of the United States. It is 96mi south of Seattle, Washington, and 50mi northeast of Portland, Oregon. Mount St. Helens takes its English name from the British diplomat Lord St Helens, a friend of explorer George Vancouver who made a survey of the area in the late 18th century. The volcano is located in the Cascade Range and is part of the Cascade Volcanic Arc, a segment of the Pacific Ring of Fire that includes over 160 active volcanoes. This volcano is well known for its ash explosions and pyroclastic flows.Mount St. Helens is most notorious for its major 1980 eruption, the deadliest and most economically destructive volcanic event in the history of the United States. Fifty-seven people were killed; 250 homes, 47 bridges, 15mi of railways, and 185mi of highway were destroyed. A massive debris avalanche triggered by an earthquake measuring 5.1 on the Richter scale caused an eruption that reduced the elevation of the mountain's summit from 9677ft to 8363ft, leaving a 1mi wide horseshoe-shaped crater. The debris avalanche was up to 0.7mi3 in volume. The Mount St. Helens National Volcanic Monument was created to preserve the volcano and allow for its aftermath to be scientifically studied.
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Mount St. Helens Reviews
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  • approx 1 hr from main hwy; fascinating! My older teen sons were impressed. Very cool interpretation building. Awe inspiring to when you absorb what went on there just a few short years ago. Apparently...  more »
  • Truly amazing to see the volcano and the impacts of the eruption 37 years on still visible. We went along the trail from the Johnson Ridge observatory towards Spirit Lake for about 3 Miles. For late S...  more »
  • Give yourself plenty of time. Although the distance may not seem that far from the highway, it takes quite a bit longer to get in and then out of the park than you may think (approximately1 hour each ...  more »

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